Ball mill liner

Abstract

The application discloses a ball mill barrel lining plate, which comprises a main plate, wherein an installation structure is formed in the main plate, and a lifting strip is integrally fixed on the main plate, and the main plate and the lifting strip are coated with a rubber layer. According to the ball mill barrel lining plate, at least one of the following technical effects is achieved: the main plate and the lifting strip are arranged in an integrated structure, and then a rubber layer is coated outside, so that the weight of the barrel lining plate is greatly reduced, the lifting strip does not need to be aligned with the main plate during installation, the installation difficulty of the barrel lining plate is greatly reduced, and the installation time of the barrel lining plate is shortened; meanwhile, the weight of the barrel lining plate is reduced, so that the demand for power is greatly reduced, and the energy-saving effect is achieved; the rubber layer coated outside the barrel lining plate can also play a buffering role, the noise generated during the use of the mill is greatly reduced, and the negative influence on the hearing of workers is avoided.

Description

Technical Field

[0001] This invention relates to the field of cylinder liner technology, and specifically to a ball mill cylinder liner. Background Technology

[0002] Ball mills are key equipment for regrinding materials after crushing, and are one of the important pieces of equipment used in the grinding section of metal mines to process metal ores. The main body of a ball mill is a rotating cylinder made of rolled steel plates, with end caps with hollow shafts at both ends, and lined with plates on the inner wall. Different sizes of grinding media (or grinding media) are contained inside the cylinder. When the mill rotates, the grinding media, due to centrifugal force, rotates with the cylinder and is carried to a certain height. Then, due to their own gravity, they fall back down, impacting the material. Simultaneously, the grinding media slide and roll within the mill, further grinding the material. Under the combined action of impact and grinding, the material is crushed and finely ground. Ball mills also play a mixing role when grinding batches.

[0003] Ball mill liners are used to protect the mill body from direct impact and friction from the grinding media and materials. Different types of liners can also be used to adjust the movement of the grinding media to enhance the crushing effect of the grinding media on the materials, thereby improving the mill's grinding efficiency, increasing output, and reducing metal consumption.

[0004] The mill liner mainly consists of two parts: the main body plate and the lifting bars. In use, multiple main body plates and lifting bars are installed and fixed inside the mill cylinder. The main body plates form a cylindrical structure, and the lifting bars are used to move the material. However, the existing main body plate and lifting bars are two independent structures. During installation, the main body plate and lifting bars need to be transported to designated positions separately, and the lifting bars need to be aligned with the main body plate so that the bolt holes on both correspond. Then, they are fixed to the mill cylinder with bolts and nuts. Because the existing mill liners are made of manganese steel to achieve high wear resistance and strength, the mill liners are quite heavy. Therefore, the process of transporting the main body plate and lifting bars to the designated position and aligning them is difficult, making the installation of the existing mill liners time-consuming and labor-intensive. Summary of the Invention

[0005] The technical problem solved by this invention is: how to reduce the installation difficulty of the cylinder liner and shorten the installation time of the cylinder liner.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A ball mill cylinder liner includes a main plate with an installation structure and a lifting strip integrally fixed on the main plate. The main plate and the lifting strip are covered with a rubber layer.

[0008] As a further aspect of the present invention, the mounting structure is a countersunk hole.

[0009] As a further aspect of the present invention: the countersunk hole includes a first hole and a second hole, the size of the first hole is larger than the size of the second hole, and a guide slope is provided between the first hole and the second hole.

[0010] As a further aspect of the present invention: a ramp is provided on one side of the front end when the lifting bar rotates.

[0011] As a further aspect of the present invention: the angle between the slope of the lifting bar and the meridian of the cylinder is α, 15°≤α≤40°, wherein the meridian passes through the connection position between the slope of the lifting bar and the main plate.

[0012] As a further aspect of the present invention: the end of the cylindrical liner that connects with another cylindrical liner along the direction of the cylindrical axis is called the connecting part, and the straight line of the connecting part is not parallel to the X-plane, wherein the X-plane is perpendicular to the axis of the cylindrical body.

[0013] As a further aspect of the present invention: the docking portion includes a first line segment and a second line segment, the lines containing the first line segment and the second line segment are parallel, and a third line segment is provided between the first line segment and the second line segment for connecting the two.

[0014] As a further aspect of the present invention, at least one lifting lug is fixedly provided on the main body plate.

[0015] As a further aspect of the present invention: the side of the main body plate away from the lifting strip is arc-shaped.

[0016] As a further aspect of the present invention: the main body plate and the lifting strip are both made of Harda steel plate.

[0017] A ball mill cylinder liner according to the present invention has at least one of the following technical effects:

[0018] This invention integrates the main body plate and the lifting strip into a single structure, then covers the outside with a rubber layer, significantly reducing the weight of the cylinder liner. Furthermore, it eliminates the need to align the lifting strip with the main body plate before installation, greatly simplifying the installation process and shortening the installation time. Simultaneously, the reduced weight of the cylinder liner significantly lowers the power requirements, resulting in energy savings. The rubber layer covering the cylinder liner also acts as a buffer, greatly reducing noise generated during mill operation and minimizing negative impacts on workers' hearing.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a three-dimensional structural diagram of the split-joint structure of the cylindrical liner plate of the present invention;

[0022] Figure 2 This is the present invention. Figure 1 A schematic diagram of the structure viewed from the center;

[0023] Figure 3 This is the present invention. Figure 2 A schematic diagram of the cross-section at point AA;

[0024] Figure 4 This is the present invention. Figure 3 A magnified structural diagram of part A in the middle;

[0025] Figure 5 This is the present invention. Figure 2 A structural schematic diagram of the cross-section at point BB;

[0026] Figure 6 This is a side view of the cylindrical liner of the present invention.

[0027] Figure 7 This is a rear view schematic diagram of one embodiment of the cylindrical liner plate of the present invention;

[0028] Figure 8 This is a rear view of a second embodiment of the cylindrical liner of the present invention.

[0029] Figure 9 This is a rear view of a third embodiment of the cylindrical liner of the present invention.

[0030] Figure 10 This is a schematic diagram of the internal structure of the cylindrical liner of the present invention.

[0031] In the diagram: 100, main body panel;

[0032] 110. Countersunk hole; 111. First hole; 112. Second hole; 113. Guide slope;

[0033] 120. Hanging lugs;

[0034] 130. Connecting section; 131. First segment; 132. Second segment

[0035] 200. Lifting bar; 201. First upright plate; 202. Second upright plate; 203. Third upright plate; 204. Supporting triangular plate; 205. Horizontal plate;

[0036] 210. Slope. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0039] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] This invention provides a ball mill cylinder liner, including a main plate 100, an installation structure on the main plate 100, a lifting strip 200 integrally fixed on the main plate 100, and a rubber layer covering the main plate 100 and the lifting strip 200.

[0041] Please see Figure 1-7As shown, specifically, the cylinder liner is used to protect the mill cylinder from direct impact and friction from the grinding media and materials. In use, the individual components of the cylinder liner are installed and fixed inside the mill cylinder, forming a cylindrical shape to protect the cylinder. An installation structure is provided on the main body plate 100 at a position offset from the lifting bar 200. This installation structure is used to fix and connect the cylinder liner to the mill cylinder during use. Both the main body plate 100 and the lifting bar 200 are made of high-strength steel plate. During production, the main body plate 100 can be welded together. The main body plate 100 and the lifting strip 200 are fixedly connected to form a whole, or they can be directly integrally molded to make them a whole. Then, a rubber layer is formed on the outside of the integral main body plate 100 and the lifting strip 200 by vulcanization. The specific process can be as follows: First, the main body plate 100 of the hardboard material is welded to the lifting strip 200 to form a whole. Then, the integral main body plate 100, the lifting strip 200 and the rubber are placed into a mold. Then, the mold is placed on a vulcanizing machine to vulcanize and fix the rubber to the outside of the liner.

[0042] The mill liner is used to protect the mill body from direct impact and friction from grinding media and materials. Existing liners are mostly made of high manganese steel. However, due to the high weight of the liner and the fact that the main plate 100 and the lifting strip 200 on the liner are separate structures, when installing them to form a cylindrical structure inside the mill, a bolt is passed through the lifting strip 200 and the main plate 100. The bolt first presses the lifting strip 200, and then the lifting strip 200 presses the main plate 100, and then the nut is used to lock it in place. Thus, when installing the mill liner, the lifting strip 200 and the main plate 100 must be aligned before the bolt can be inserted to complete the fixation. This makes the installation of the mill liner difficult and time-consuming. To overcome this problem, this embodiment of the invention uses a main body plate 100 made of Harda plate material and lifting bars 200 to form an integrated skeleton structure, and then covers it with a rubber layer. This ensures the strength of the liner while greatly reducing the overall weight of the liner, making installation easier. Furthermore, since the main body plate 100 and lifting bars 200 form an integrated structure, there is no need to align their positions during installation, which greatly reduces the difficulty of installing the liner into the cylinder to form a cylindrical structure, thus significantly reducing installation time. The original liner required about 7 days to install, while this embodiment can be completed in 3 days. The various parts of the liner are installed inside the mill cylinder to form a cylindrical shape, protecting the cylinder. At the same time, this embodiment of the cylinder liner reduces the locations where shear forces are exerted on the bolts. In the original liner, the connection points between the lifting bars 200 and the main body plate 100, and between the main body plate 100 and the cylinder, can potentially exert shear forces on the bolts, leading to bolt damage. This is especially true when the lifting bars 200 are in use, as they can cause damage to materials and... The abrasive grains generate a lifting effect, resulting in a large shear force at the connection between the lifting bar 200 and the main plate 100. In this embodiment, the main plate 100 and the lifting bar 200 are an integral structure, reducing the connection points where shear force acts on the bolts. The force generated by the lifting bar 200, which has a large shear force, is first transmitted to the main plate 100. With the main plate 100 in contact with the inner wall of the cylinder, the shear force is diverted at both ends of the main plate 100, which can greatly reduce the shear force acting on the bolts, thereby improving the service life of the bolts. When the bolts are damaged, the cylinder liner will detach, affecting the operation of the mill. Downtime for maintenance will also affect the operation of the mill in terms of time. Furthermore, the rubber layer formed by covering the cylinder liner can also play a buffering role, greatly reducing the noise generated during the operation of the mill and avoiding excessive negative impact on the hearing of workers. At the same time, the weight of the cylinder liner in this embodiment is much lower than that of existing cylinder liners, thereby greatly reducing the power requirement and achieving an energy-saving effect.

[0043] Please see Figure 4In one embodiment of the present invention, the mounting mechanism may use a countersunk hole 110, so that the head of the bolt used for fixing can be concealed within the main body plate 100, reducing the impact of materials on the bolt during use; furthermore, the countersunk hole 110 includes a first hole 111 and a second hole 112 (e.g., Figure 4 The size of the first hole 111 is larger than the size of the second hole 112, and a guide slope 113 is provided between the first hole 111 and the second hole 112. That is, the size of the inlet end when the bolt is inserted is relatively large, while the size of the second hole 112 corresponds to the size of the bolt shank, which makes it easier to insert the bolt.

[0044] Please see Figure 6 In one embodiment of the present invention, when the cylinder rotates, the lifting bar 200 pushes the material, that is, it lifts the material to a certain height. The ball mill achieves the abrasive effect through the relative movement of the material and abrasive particles during flow. When the material and abrasive particles are lifted to a high height, the abrasive particles will fall and may hit the liner, shortening the liner's service life. To ensure that the material can flow in a tumbling state as the cylinder rotates, a ramp 210 is provided on the front side of the lifting bar 200 when it rotates. The ramp 210 can be formed by setting the longitudinal section of the lifting bar 200 to be arc-shaped or trapezoidal, etc. As an example, in this embodiment, the longitudinal section of the lifting bar 200 is trapezoidal (e.g., Figure 5 , 6 Furthermore, the angle between the slope 210 of the lifting bar 200 and the meridian of the cylinder is α (e.g., Figure 6 ), 15°≤α≤40°, wherein the meridian passes through the connection position of the ramp 210 of the lifting bar 200 and the main plate 100, so as to ensure the lifting effect while avoiding the material falling due to excessive height.

[0045] Please see Figure 7-9In one embodiment of the present invention, the end of the cylindrical liner that connects with another cylindrical liner along the direction of the cylindrical axis is a connecting portion 130. The connecting portion 130 is not parallel to the X-plane, which is perpendicular to the axis of the cylindrical body. After the connecting portions 130 of the two cylindrical liners connected along the direction of the cylindrical axis are joined, a groove is formed. If the groove is a straight structure, that is, the groove is parallel to the X-plane, then after the cylindrical liner is enclosed to form a cylindrical structure, the groove will form a complete circle, and the circle is parallel to the X-plane. This will cause some material to always be in the groove and flow along the groove when the cylinder rotates, resulting in a wear rate at the groove being much higher than at other locations. To avoid this situation, the connecting portion 130 is inclined. Thus, the groove formed after the cylindrical liner is enclosed to form a cylindrical structure is not circular when unfolded. As a result, when the cylinder rotates, the material will flow out from the inclined groove, preventing the material from always flowing along the groove. Specifically, the docking part 130 can be configured as follows: the docking part 130 includes a first line segment 131 and a second line segment 132 (e.g., Figure 7 The first line segment 131 and the second line segment 132 are located on parallel lines, and a third line segment is provided between the first line segment 131 and the second line segment 132 to connect them. This creates a concave-convex mating structure at the third line segment, which also serves as a positioning element during the installation of the cylinder liner, making it easier to place different cylinder liners into position when installing them separately, thus improving the efficiency of cylinder liner installation. Furthermore, the mating part 130 can also be configured as an inclined structure (e.g., Figure 8 The docking portion 130 may also include two inclined line segments that are docked together (e.g., Figure 9 ).

[0046] Please see Figure 1 In one embodiment of the present invention, at least one lifting lug 120 is fixedly provided on the main body plate 100. The lifting lug 120 is located at the upper or lower end of the main body plate 100 and is offset from the lifting bar 200 and the bolt hole. By providing the lifting lug 120, during installation, the lifting lug 120 part can be clamped by a robot arm, and then the cylinder liner can be transported to the designated position for installation.

[0047] Please see Figure 6 In one embodiment of the present invention, the side of the main plate 100 away from the lifting bar 200 is arc-shaped, and the arc shape corresponds to the cylinder of the mill, so that the main plate 100 can be close to the inner wall of the cylinder during installation, making the main plate 100 more stable.

[0048] Please see Figure 10In one embodiment of the present invention, the lifting bar 200 includes a first upright plate 201, a second upright plate 202, and a third upright plate 203, all of which are perpendicular to the main body plate 100. The first upright plate 201 is arranged perpendicularly to the second upright plate 202 and the third upright plate 203, while the second upright plate 202 and the third upright plate 203 are arranged in parallel. A plurality of supporting triangular plates 204 are fixedly mounted on the third upright plate 203, and a transverse plate 205 is fixedly mounted outside the supporting triangular plates 204. The transverse plates 205 together form a triangular prism structure around the third upright plate 203 (e.g., ...). Figure 10 Furthermore, a receiving groove is formed between the triangular prism and the second vertical plate 202. When the rubber layer is formed, the rubber fills into the receiving groove and covers the outside of the triangular prism, forming the slope 210 structure of the lifting strip 200. In this way, a main skeleton is formed inside the lifting strip 200 to ensure strength. Then, the rubber layer is vulcanized to form an integral lifting strip 200, which ensures the connection between the rubber layer and the skeleton and further reduces the weight of the cylinder liner. The weight of the cylinder liner is reduced, and its installation difficulty is also reduced. At the same time, the structure forms a grid to accommodate the rubber and avoids rapid wear of the rubber part.

[0049] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the scope of the claims.

Claims

1. A ball mill cylinder liner, comprising a main body plate (100), wherein the main body plate (100) is provided with an mounting structure, characterized in that, A lifting strip (200) is integrally fixed on the main body plate (100), and the main body plate (100) and the lifting strip (200) are covered with a rubber layer. The end of the cylindrical liner that connects with another cylindrical liner along the direction of the cylindrical axis is the connecting part (130). The straight line of the connecting part (130) is not parallel to the X plane, wherein the X plane is perpendicular to the axis of the cylindrical body. The docking part (130) includes a first line segment (131) and a second line segment (132). The lines on which the first line segment (131) and the second line segment (132) are located are parallel, and a third line segment is provided between the first line segment (131) and the second line segment (132) for connecting the two. The main body plate (100) and the lifting strip (200) are both made of HANDRA steel; the main body plate (100) and the lifting strip (200) form an integrated structural skeleton; The mounting structure is a countersunk hole (110); The countersunk hole (110) includes a first hole (111) and a second hole (112). The size of the first hole (111) is larger than the size of the second hole (112), and a guide slope (113) is provided between the first hole (111) and the second hole (112).

2. A ball mill cylinder liner according to claim 1, characterized in that, When the lifting bar (200) rotates, a ramp (210) is provided on one side of the front end.

3. A ball mill cylinder liner according to claim 1, characterized in that, The angle between the slope (210) of the lifting bar (200) and the meridian of the cylinder is α, 15°≤α≤40°, wherein the meridian passes through the connection position between the slope (210) of the lifting bar (200) and the main plate (100).

4. A ball mill cylinder liner according to any one of claims 1 to 3, characterized in that, At least one lifting lug (120) is fixedly provided on the main body plate (100).

5. A ball mill cylinder liner according to any one of claims 1 to 3, characterized in that, The side of the main plate (100) away from the lifting bar (200) is arc-shaped.

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